//
//  UIColor+Hex.m
//  shaliangApp
//
//  Created by Adam Vijay on 2018/8/23.
//  Copyright © 2018年 Facebook. All rights reserved.
//

#import "UIColor+Hex.h"

@implementation UIColor (Hex)
// 透明度固定为1，以0x开头的十六进制转换成的颜色
+ (UIColor*) colorWithHex:(long)hexColor;
{
  return [UIColor colorWithHex:hexColor alpha:1.];
}
// 0x开头的十六进制转换成的颜色,透明度可调整
+ (UIColor *)colorWithHex:(long)hexColor alpha:(float)opacity
{
  float red = ((float)((hexColor & 0xFF0000) >> 16))/255.0;
  float green = ((float)((hexColor & 0xFF00) >> 8))/255.0;
  float blue = ((float)(hexColor & 0xFF))/255.0;
  return [UIColor colorWithRed:red green:green blue:blue alpha:opacity];
}
// 颜色转换三：iOS中十六进制的颜色（以#开头）转换为UIColor
+ (UIColor *) colorWithHexString: (NSString *)color
{
  NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
  
  // String should be 6 or 8 characters
  if ([cString length] < 6) {
    return [UIColor clearColor];
  }
  
  // 判断前缀并剪切掉
  if ([cString hasPrefix:@"0X"])
    cString = [cString substringFromIndex:2];
  if ([cString hasPrefix:@"#"])
    cString = [cString substringFromIndex:1];
  if ([cString length] != 6)
    return [UIColor clearColor];
  
  // 从六位数值中找到RGB对应的位数并转换
  NSRange range;
  range.location = 0;
  range.length = 2;
  
  //R、G、B
  NSString *rString = [cString substringWithRange:range];
  
  range.location = 2;
  NSString *gString = [cString substringWithRange:range];
  
  range.location = 4;
  NSString *bString = [cString substringWithRange:range];
  
  // Scan values
  unsigned int r, g, b;
  [[NSScanner scannerWithString:rString] scanHexInt:&r];
  [[NSScanner scannerWithString:gString] scanHexInt:&g];
  [[NSScanner scannerWithString:bString] scanHexInt:&b];
  
  return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}


@end
